In order to be sure that the results of our experiment can be reproduced, we should

Kepler's third law can be used to compare the moon's orbit around the earth to the orbit of the earth around the sun.

Which of the following simple machines is not properly identified? A. Scissors: lever B. Pizza cutter: wedge C. Screw: wheel and axle D. Ramp: inclined plane

You are using an electric motor that requires 40 volts to operate. The motor's circuit uses only 5 amps of direct current. How much power is being used?

Air becomes wind as it flows from a. low pressure to low pressure. c. low pressure to high pressure. b. high pressure to high pressure. d. high pressure to low pressure.

Sometimes scientists gather information that contradicts accepted theories or explanations. If the new information is replicated many times, the accepted theory that it contradicts will often be updated or modified to reflect the new information.

Because the moon rotates once for each revolution around Earth, Choose one answer. a. you see some phases more than others. b. a different side of the moon faces Earth each day. c. you never see the far side of the moon.

Planet A takes 1 year to go around its star at an average of 1 A. U. distance. Planet B is 4 A. U. from the star. Calculate how long Planet B takes to orbit.

Average mass of a toy car (small, hot wheels) ?

A pwc capsizes. what is the best way to roll the pwc to turn it upright?

Which biome has the most extreme conditions